Hi christinep19764445 ,
Would like to inform that Acrobat Dc is an upgraded version to Acrobat XI Pro.
Please make sure you are using Acrobat Pro DC not Acrobat Reader DC (Free version),because Acrobat Pro will help you in deleting the pages from PDF.Also please check under your Account to know more about which service you have an active subscription.
Referring to this article you may the service under your account:- Manage your Adobe Creative Cloud membership
If you haven't install Acrobat Pro DC, refer to this article :- Download Adobe Acrobat DC (Continuous) | Enterprise or VIP
After installing the application, referring to this article to know how to delete the Pages :- Rotate, move, delete, and renumber PDF pages in Adobe Acrobat
Let me know how it goes.
Regards,
Yatharth